Conversion to LP Gas
Use accessory LP gas conversion kit when converting this unit for
use with LP fuel usage for elevations up to 7000 ft. For elevations
above 7000 fl, refer to Table 7 to identify the correct orifice size for
the elevation. See Table 6 for the number of orifices required for
each unit size. Purchase these orifices from your local Carrier
dealer. Follow instructions in accessory Installation Instructions to
install the correct orifices.
Table 7 - LP Gas Conversion*
ELEVATION (ft) LP GAS ORIFICE 1
0-1,999 52
2,000 52
3,000 53
4,000 53
5,000 53
6,000 53
7,000 53
8,000 54
9,000 54
10,000 54
11,000 54
12,000 55
13,000 55
14,000 56
As the height above sea level increases, there is less oxygen per cubic
foot of air. Therefore, heat input rate should be reduced at higher altitudes.
Includes a 4% input reduction per each 1000 ft.
1- Orifices available through your Carrier dealer
Step 8 -- Install Gas Piping
Unit is equipped for use with natural gas. Refer to local building
codes, or in the absence of local codes, to ANSI Z223.l-latest year
and addendum Z223.1A-latest year entitled HFGC. In Canada,
installation must be in accordance with the CANI.BI49.1 and
CANI.BI49.2 installation codes for gas burning appliances.
Support gas piping as shown in the table in Fig. 10. For example, a
3/4-in. gas piping must have one field-fabricated support beam
every 8 ft. Therefore, an 18-ft long gas pipe would have a
minimum of 3 support beams. See Fig. 10 for typical pipe guide
and locations of external manual gas shutoff valve.
Install field-supplied manual gas shutoff valve with a l/8-in. NPT
pressure tap for test gauge connection at unit. The pressure tap is
located on the gas manifold, adjacent to the gas valve. Field gas
piping must include sediment trap and union. (See Fig. 11.) Install
a field-supplied gas regulator.
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury or death.
Do not pressure test gas supply while connected to unit.
Always disconnect before servicing.
IMPORTANT: Natural gas pressure at unit gas connection must
not be less than 5.0-in. wg or greater than 13.0-in.wg for all heat
sizes. Size the gas-supply piping for 0.5-in.wg maximum pressure
drop. Do not use supply pipe smaller than unit gas connection.
F 9" MINIMUMcLEXRANCE
"'_AS_"'-UNI_"T_ 1 FOR PANELREMOVAL L
I
DRIP LEGPER NFGC
BASE ROOFCURB
FIELD-FABRICATED
SUPPORT*
FROM GAS METER
LEGEND
NFGC i National Fuel Gas Code
*Field supplied.
NOTE: Follow all local codes.
SPACING OF SUPPORTS
STEEL PIPE SPACING OF SUPPORTS
NOMINAL DIAMETER (in.) X DIMENSION (ft)
1/2 6
3/4or 1 8
11/4 or larger 1O
C06115
Fig. 10 - Gas Piping Guide (With Accessory
Thru-the-Cab Service Connections)
MANUALSHUTOFF
(FIELDSU GAS
PRESSURETAP
(1/8" NPT PLUG)
_-- _ SEDIMENT TRAP
C06236
Fig. 11 - Field Gas Piping
12
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